Reference

Aitor Payros, Jaume Dinares-Turell, G. Bernaola, Xabier Orue-Etxebarria, Estibaliz Apellaniz, J. Tosquella (2011): Cyclostratigraphy of the Early/Middle Eocene transition: a Pyrenean perspective – Berichte der Geologischen Bundesanstalt – 85: 126.